The 5th Edition Midgard is pretty straightforward. There's 3 character books available, Midgard Heroes for 5e, Southlands Heroes for 5e, and Unlikely Heroes for 5e. There's 7 Deep Magic sourcebooks (small PDFs, really) dealing with Clockwork Magic, Ley Lines, and Illumination (the big 3 of new schools for Midgard).
There's about 2 dozen adventures (mostly in Book of Lairs and Prepared) that are Midgard-friendly, and we've got new clerical domains in playtest now.
And of course Tome of Beasts contains the 2 dozen most important Midgard monsters for 5E (shadow fey, void dragons, clockwork creatures, drakes, and a few from the Southlands).
So..... There's no official 5E setting book yet. There's a lot of player character support. There's monster support. We're very much planning to increase 5E support for the rest of 2016 and especially in 2017.